package com.zhouxiaoge.security.brower;

import com.zhouxiaoge.security.properties.SecurityProperties;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.security.web.DefaultRedirectStrategy;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.savedrequest.HttpSessionRequestCache;
import org.springframework.security.web.savedrequest.RequestCache;
import org.springframework.security.web.savedrequest.SavedRequest;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 作者： 周小哥
 * 时间： 2018-07-23 23:05
 * 邮箱： gqzmy@outlook.com
 */

@RestController
public class BrowserSecurityController {

    private Logger logger = LoggerFactory.getLogger(getClass());
    private RequestCache requestCache = new HttpSessionRequestCache();
    private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();

    private final SecurityProperties securityProperties;

    @Autowired
    public BrowserSecurityController(SecurityProperties securityProperties) {
        this.securityProperties = securityProperties;
    }

    /**
     * 当需要身份认证时，跳转到这里
     */
    @RequestMapping("/authentication/request")
    @ResponseStatus(code = HttpStatus.UNAUTHORIZED)
    public SimpleResponse requireAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException {
        SavedRequest savedRequest = requestCache.getRequest(request, response);
        if (savedRequest != null) {
            String redirectUrl = savedRequest.getRedirectUrl();
            logger.info("引发跳转的请求是：" + redirectUrl);
            if (StringUtils.endsWithIgnoreCase(redirectUrl, ".html")) {
                redirectStrategy.sendRedirect(request, response, securityProperties.getBrower().getLoginPage());
            }
        }
        return new SimpleResponse("访问的服务需要身份认证，请引导用户到登录页面");
    }
}
